Flood Hazard Mapping

Main Content

Flood Hazard Mapping Bulletin Archive

Flood Hazard Mapping


Issue No. 1
  • New Mailing Lists
  • Updated Numerical Models
  • Expiration Date for MT Forms Extended
Issue No. 2
  • Proposed Rule for Future Conditions Hydrology Published
  • New HEC-RAS Use Policy
  • Congaree River Appeal Resolution
  • Guidance Regarding the Recent Changes to Part 65 of the NFIP Regulations
  • Flood Protection Restored for Parts of Five Communities in California
Issue No. 3
  • MT Forms Expiration Date
  • Forms, Documents, and Software Main Page
Issue No. 4
  • Using GIS, DFIRM, and Other Data for Sample Community Applications
  • Map Modernization Progress Report for 2000-2001
  • Guidance for Scoping Flood Mapping Projects
  • Update on Congaree River Flood Hazard Mapping Restudy
  • Standard DFIRM Database Information Updates
  • Coalition Details
  • RASPLOT
  • Updated RASPLOT and CHECK-RAS Guidance
Issue No. 5
  • Huntington Beach, California, Floodplain Reduced
  • Draft Comprehensive Guidelines and Specifications for Flood Hazard Mapping Partners
  • FEMA Receives Outstanding Civil Engineering Achievement Award for Illinois DFIRM Project
  • List of Numerical Models Accepted by FEMA for NFIP Usage Recently Updated
  • Supporting Technical Documentation for Acceptable Models Now Available for FLDWAV, MIKE21, and SWMM
  • Latest Compendium of Flood Map Changes
  • MT Forms Expiration Date Extended
  • Standard Flood Hazard Determination Form Extension Sought
Issue No. 6
  • Flood Protection Restored for Los Angeles River; LOMRs Issued for 12 Communities in California
  • Final Rule for Future-Conditions Hydrology Published
  • Coastal Tutorial Featuring CHAMP
  • Automated Hydraulics and Hydrology
  • Mitigation Resources for Success CD (FEMA 372)
Issue No. 7
  • Huntington Beach Floodplain Reduced by Santa Ana River Mainstem Project
  • Coastal Hazard Analysis Modeling Program, Version 1.1
  • Mapping Needs Update Support System State Profiles
  • Los Angeles River Map Revision Information
  • Updated Listing of Numerical Models Accepted by FEMA for National Flood Insurance Program (NFIP) Usage
  • Supporting Technical Documentation for Acceptable Models
  • MT Forms
Issue No. 8
  • Guidelines and Specifications for Flood Hazard Mapping Partners
  • Woodland and Yolo County, California, Maps Revised as a Result of Cache Creek Restudy
  • MT Forms
Issue No. 9
  • Enhanced DFIRM Database
  • MT-EZ Forms
  • Site Redesign
Issue No. 10
  • Iberia Parish, Louisiana, Map Revision
  • New Fee Schedule Effective in September
  • Site Redesign
Issue No. 11
  • FHM Website Wins Golden Web Award from the I.A.W.M.D.
  • Floodplain Modeling Manual: HEC-RAS Procedures for HEC-2 Modelers
  • Flood Hazard Mapping Web Site Receives AAWM Gold Award
  • Standard DFIRM Database Specifications Updated
  • Updated MT-1 and MT-2 Forms
  • Accepted Numerical Models List for NFIP Usage
  • Coastal Flood Hazard Technical Resources Page
  • Windows version of the National Flood Frequency Program

Back To Top

CHECK-RAS


Issue No. 1
  • Why should I know how to use CHECK-RAS?
Issue No. 2
  • Discussion of Manning's "n" and contraction/expansion coefficients
Issue No. 3
  • Water-surface elevation of lower discharge is higher than the water-surface elevation of higher discharge
Issue No. 4
  • Computation of encroachment stations at structures
Issue No. 5
  • Determining abutment stations of a bridge where the low chord line may cross the ground line
Issue No. 6
  • Relationship among the Abutment Stations, Ineffective Flow Stations, and Encroachment stations at a Bridge
Issue No. 7
  • Continuation of October 2001 Topic
Issue No. 8
  • Negative Surcharge and the Selection of the Bridge Modeling Approach
Issue No. 9
  • Encroachment stations are not computed at a structure with weir flow
Issue No. 10
  • Computing encroachment stations at a structure with weir flow
Issue No. 11
  • Encroachment stations are specified within the channel bank stations
Issue No. 12
  • Encroachment Method is not specified at a cross section
Issue No. 13
  • Second case for the message, FW EM 01: Encroachment Method is not specified at a cross section
Issue No. 14
  • Encroachment Method ____ is used
Issue No. 15
  • Second Case for the message, FW EM 02: Encroachment Method ____ is used
Issue No. 16
  • FW EM 04: Target surcharge value is equal to zero
Issue No. 17
  • FW EM 05: Target surcharge value of ___ is greater than the allowable surcharge value of ___.
    A target surcharge should be specified greater than 0.00 but no more than the allowable surcharge value

Back To Top

Coastal Hazard Mapping


Issue No. 1
  • Welcome to the Coastal Hazard Mailing List
Issue No. 2
  • Guidelines and Specficiations for Wave Elevation Determination and V Zone Mapping
  • Coastal Models Accepted by FEMA and NFIP for Usage
  • Introduction to the Coastal Hazard Analysis Modeling Program (CHAMP)
Issue No. 3
  • Schedule of CHAMP Database Development
  • Development of Program 1 - Transect Description/Parameter Entry
  • Helpful Hint
Issue No. 4
  • Development of CHAMP Program 2 - Transect Data Entry and Editing
  • Introduction to CHAMP Graphics
Issue No. 5
  • Development of Program 3 - Erosion Treatment
  • Helpful Hint
Issue No. 6
  • CHAMP Survey
  • CHAMP Program 4 - Wave Height Analysis
  • Helpful Hints for CHAMP Program 4
Issue No. 7
  • CHAMP Program 5 - Wave Runup Analysis
  • Helpful Hints for CHAMP Program 5
Issue No. 8
  • CHAMP Program 6 - Summary Tables and Graphics for Mapping
  • Graphics Controls
  • Help Menu
Issue No. 9
  • Conferences Addressing Coastal Hazard Concerns
  • CHAMP Tutorial to be Available on Web
  • Operational Error Found in CHAMP
Issue No. 10
  • Version 1.1 of CHAMP
  • CHAMP Enhancement Database Maintenance
  • FEMA Flood Hazard Mapping Websites
  • Coastal Training Opportunities
Issue No. 11
  • Guidelines and Specifications for Wave Elevation Determination and V Zone Mapping
  • Draft Guidelines and Specifications for Flood Hazard Mapping Partners
  • National Flood Insurance Program Regulations
  • MT-2 Forms
Issue No. 12
  • Coastal Barrier Resources System
  • Solutions to Coastal Disaster Conference
  • FEMA Map Service Center
Issue No. 13
  • FEMA-Accepted Coastal Numerical Models Websites
  • FEMA Technical Bulletins
  • Environmental Laws and Executive Orders Relating to FEMA-Assisted Coastal Projects
Issue No. 14
  • Introduction/Upcoming Coastal Hazard Bulletin Topics
  • CHAMP Graphic Export Capabilities
  • Coastal Construction Manual - FEMA Publication Number 55CD available
Issue No. 15
  • Data Requirements for Coastal Flood Hazard Analyses
Issue No. 16
  • CHAMP Application - Open-Ocean Wave Height-Dominated Case
  • Hot Topic #1 - Coastal Flood Insurance Rate Determination
  • Hot Topic #2 - ADCIRC Accepted for Hilton Head, South Carolina
Issue No. 17
  • CHAMP Application - Open Ocean Wave Height Dominated V Zone case (cont.)
  • Hot Topic #1 - Hurricane information on the FEMA web site
  • Hot Topic #2 - FEMA Coastal Flood Hazard Technical Resources Page

Back To Top

National Flood Frequency


Issue No. 1
  • Welcome to the NFF Mailing List
Issue No. 2
  • Introduction to the NFF Program and USGS Regression Equations
  • Applicability of the Regression Equations
  • Advantages and Limitations of the Regression Equations
Issue No. 3
  • The Use of USGS Regression Equations for NFIP purposes
  • The Criteria for Using Discharges Computed Using USGS Regression Equations for NFIP Purposes
Issue No. 4
  • Discussion on USGS Regression Equations and the NFF Program
  • Revisions to the USGS Regression Equations Since the NFF Software was Released
  • Locations from Which to Obtain the NFF Program and USGS Regression Equation Documentation
Issue No. 5
  • Discussion on USGS Regression Equations and the NFF Program
  • Unusual Parameters of USGS Regression Equations and How to Obtain Them
Issue No. 6
  • Discussion on USGS Regression Equations and the NFF Program
  • Unusual Parameters of USGS Regression Equations and How to Obtain Them - Part 2
Issue No. 7
  • Discussion on USGS Regression Equations and the FHH Program
  • Unusual Parameters of USGS Regression Equations and How to Obtain Them - Part 3
Issue No. 8
  • Discussion on USGS Regression Equations and the NFF Program
  • Examples in Which USGS Regression Equations are Used for NFIP Purposes
Issue No. 9
  • Discussion on USGS Regression Equations and the NFF Program
  • How to Treat "State Line Faults" (Basins Lying in More Than One State)
Issue No. 10
  • Discussion on USGS Regression Equations and the NFF Program
  • Estimating Drainage Area and Cross Sections From USGS Topo Maps
Issue No. 11
  • Discussion of USGS Regression Equations and the NFF Program
  • Measures of Accuracy in NFF
Issue No. 12
  • Discussion of USGS Regression Equations and the NFF Program
  • Weighting NFF Results with Observed
Issue No. 13
  • Discussion of USGS Regression Equations and the NFF Program
  • Estimation of Extreme Floods
Issue No. 14
  • Discussion of USGS Regression Equations and the NFF Program
  • Flood Hydrograph Estimation Using NFF
Issue No. 15
  • Discussion of USGS Regression Equations and the NFF Program
  • Urban Flood Hydrograph Estimation Using NFF
Issue No. 16
  • Discussion of USGS Regression Equations and the NFF Program
  • Southwestern United States Equations
Issue No. 17
  • Discussion of USGS Regression Equations and the NFF Program
  • NFF Versions 3.0 and 3.1

Back To Top

Quick-2

Issue No. 1
  • Welcome to the Quick-2 Mailing List
  • Why should I know how to use Quick-2?
Issue No. 2
  • Ensuring Quick-2 is loaded and running properly
  • Use of Quick-2 in preparing a CLOMR-F
Issue No. 3
  • Using Quick-2 to determine a BFE using the irregular channel, normal depth feature
  • Running multiple analysis using different n-values and discharges
  • Viewing rating curves and cross section plots
Issue No. 4
  • Creating a backwater profile and determining BFEs using the step-backwater feature
  • Viewing rating curves and cross section points
  • Determining of a property is in or out of the floodplain
Issue No. 5
  • Determining the BFE of and irregular channel at three different cross sections
  • Running multiple analyses using different discharges
  • Viewing the rating curves and cross section plots
Issue No. 6
  • Examining the channel capacity of a circular channel
Issue No. 7
  • Examining the channel capacity of a circular channel - Part 2
Issue No. 8
  • Using the Quick-2 program to complete a HEC-2 run
Issue No. 9
  • Using the Quick-2 program to determine the channel capacity of a Triangular Channel
Issue No. 10
  • Using the Quick-2 program to determine normal depth in an irregular channel that has a supercritical flow
Issue No. 11
  • Using the Quick-2 program to determine the channel capacity of a rectangular channel and to test the sensitivity of the manning's n-values
Issue No. 12
  • Using the Quick-2 program to determine if the flow of a circular channel can be contained in the channel or not
Issue No. 13
  • Using the Quick-2 program to compute Base Flood Elevations (BFEs) using step-backwater analysis

Back To Top

RASPLOT

The latest version of RASPLOT, Version 3.0 Beta, replaces RASPLOT Version 2.5 and resolves all known issues identified from RASPLOT 2.5. For more information on RASPLOT 3.0 see the User Guide or download.

Issue No. 1
  • Welcome to the RASPLOT mailing list
Issue No. 2
  • Problems Creating the RASPLOT Database
  • Need two or more flood profiles
  • Problems Creating the RASPLOT Database - HEC-RAS report generated incorrectly
Issue No. 3
  • Creating a New Database
  • Using RASPLOT to Create a Profile from a Hydraulic Model That is Not HEC-2 or HEC-RAS
Issue No. 4
  • Manually Adding a Panel in RASPLOT
Issue No. 5
  • FAQ's Answered
Issue No. 6
  • RASPLOT Example with a HEC-2 Model
Issue No. 7
  • Upcoming RASPLOT Release Enhancements and New Functionality
Issue No. 8
  • DFX Editor: Zoom and Snap Options
Issue No. 9
  • DFX Editor: Ortho On/Off and Draw Tools
Issue No. 10
  • DFX Editor: Modify Tools (Part 1)
Issue No. 11
  • DFX Editor: Modify Tools: Trim (Part 2)
Issue No. 12
  • DFX Editor: Modify Tools: Extend and Break (Part 3)
Issue No. 13
  • How To Use the DXF Editor: Modify Tools (Part 4): Fillet & Offset
Issue No. 14
  • How To Use the DXF Editor: Block
Issue No. 15
  • Pre-installed Blocks in the DXF Editor
  • Example of Using a Pre-installed Block: BACKWATER

Back To Top

Last Modified: Friday, 15-Jun-2007 11:57:20 EDT


Back to Top